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Failed MFA Challenge

Low Investigating
ALR-00087 · 2026-07-05T16:58:52Z

Description

Multiple failed MFA challenges for user 'k.brown' — 12 push notifications in 3 minutes suggesting MFA fatigue attack. DecoyPulse locked account.

Alert Metadata

Alert ID
ALR-00087
Timestamp
2026-07-05T16:58:52Z
Severity
Low
Status
Investigating
Detection Source
DecoyPulse
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
WS-LAP-011
User Account
k.brown
Source IP
91.61.195.215
Destination IP
10.0.91.43
Origin Country
FR France

MITRE ATT&CK Mapping

Tactic
Credential Access
Technique
T1621
Reference
attack.mitre.org/techniques/T1621

Investigation Timeline

16:58:52 Event ingested by SOC365 Engine
16:58:57 EmilyAI triage started — correlation enrichment
16:59:06 EmilyAI confidence: 86% — escalated to human analyst
16:59:14 Alert assigned to analyst: EmilyAI (auto)
17:00:18 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00026 1h ago Ransomware Behaviour Detected Medium Escalated WS-LAP-011
ALR-00471 14h ago Failed MFA Challenge Informational Resolved SRV-MAIL-01
ALR-00330 1d ago Port Scan Detected Informational Resolved WS-LAP-011
ALR-00281 2d ago DLP Policy Violation Low Resolved WS-LAP-011
ALR-00296 2d ago Failed MFA Challenge Medium Escalated WS-LAP-010